How to open all windows maximized all the time on every applications and folders?

How to open all windows maximized all the time on every applications and folders?
I need every folder or application to open fully maximized in Windows XP.

Now it randomly opens in various sizes all over the desktop.

I know that if you maximize the window before closing it the next time you open it, it will open maximized, however, I can't open 10 000 files, folders and applications maximize them and close them so that the next time they will be maximized!

I'm not sure there is a Windows shortcut to maximize all open windows, so I created a little utility to do just that.
No installation. The proggie runs as a tray app (bottom right corner of the screen)